Combined stop-cock and expansion-valve.



' PATBNTED JULY 31, 1906.

F. W. FELSBERG. COMBINED STOP GOGK AND. EXPANSION VALVE.

APPLIO ATION FILED JUNE 14.1905.

2 SHEETS-SHEET 1.

, WASHINGTON, u. c.

PATENTED JULY 31, 1906.

F. W. FELSBERG. COMBINED STOP COCK AND EXPANSION VALVE.

APPLICATION FILED JUNE 14.1905.

2 SHEETS-SHEET 2.

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-UNITED STATEMENT Enron.

FREDERICK W. FELSBERG, OF DAYTON. KENTUCKY, ASSIGNOR TO THE TRIUMPH ICE MACHINE COMPANY, OF CINCINNATI, OHIO.

COMBINED STOP-COCK AND EXPANSION-VALVE.

Specification of Letters Patent.

n atenteu Jury S1, 1906.

Application filed June 14,1905. Serial No. 265,149.

I all whmn it may concern:

Be it known that I, FREDERICK WV. FELs BERG, a citizen of the United States, residing at Dayton, in the county of Campbell and State of Kentucky, have invented certain new and useful Improvements in a Combined Stop-Cock and Expansion-Valve, of which the following is a full, clear, and exact specification.

My present invention relates to improvements in the construction of valves, and especially to expansion valves particularly adapted for use in refrigerating and ice-mak ing machinery.

In the majority of refrigerating plants operating on the ammonia expansion system and employing the ordinary form of expansion-valves the annual expense due to the necessity of repairing and reseating the expansion-valves is enormous, as in order to make such repairs the entire refrigerating system must be completely evacuated, numerous disconnections made, and the valve removed from its casing. Furthermore, considerable valuable time is lost and much trouble is experienced by such a procedure.

The object of my inveniton is to avoid the difficulties above enumerated and to reduce the time, labor, and expense heretofore required to repair or replace the expansionvalves.

A further object is to permit the expansionvalve to be reground, reseated, or otherwise repaired without the necessity of pumping out the piping system or interrupting the operation of refrigerating system in any manner.

The invention consists of a combination stop-cock and expansion-valve, the expansion-valve being arranged within the plug of the stopcock in such a manner that the ports of the stop-cock may be closed to permit the expansion-valve to be removed and repaired, or the expansionvalve may be replaced readily by. a plug-stem and the stop-cock employed as an expansion-valve while the regu lar expansion-valve is being reground, reseated, or otherwise repaired.

The invention further consists of details of construction of said combined stop-cock and expansion-valve, which will be hereinafter described, and more particularly pointed out in the appended claims.

In the accompanying drawings, which illustrate the preferred embodiment of my invention, Figure 1 is a side elevation of my combination stop-cock and expansion-valve. Fig. 2 is a longitudinal section through same on the line 2 2, Fig. 1. Fig. 3 is a view similar to Fig. 2, showing the arrangement employed when the stop-cock is used as anexpansionvalve. Fig. 4 is a detail section view showing the stop-cock plug in elevation and in its closed position. Fig. 5 is a view of the expansion-valve stem. Fig. 6 is a section on line 6 6 of Fig. 2, and Fig. 7 is a view of the plug-stem.

Referring now to the drawings, the valvecasing 10 is provided. with the conical valveseat 11 and with the ports 12 and 13, the port 12 acting as the inlet to the valve and the port 13 acting as the exhaust for the valve. Mounted. in the conical seat 11 is the conical plug-valve or stop-cock 14, provided with the passage-ways 15 and 16, which are adapted to register with and control the ports 12 and 13. The passage-way15 leads to the chamber 17 in the hollow plug-valve 14 just above the valve-seat 1.8, and the passage way 16 leads from said chamber just below said valve-seat. The expansion-valve stem 19 cooperates with said valve-seat to control the flow of gas or liquid through the passageways in said plug-valve. The lower end of this valve-stem is provided with the conical valve-seat 20 and with the cylindrical extension 21, having the V shaped groove 22 formed therein. The position of this V- shaped groove relative to the valve-seat 18 determines the flow through the expansionvalve.

The interior surface of the cylindrical extension 14 of the plug-valve 14 is threaded to receive the threaded collar 23, formed on the expansion-valve stem 19. The upper end of said stem 19 is formed with a square head to receive the removable operatinghandle 24. The extension 14 is formed at 25 with flattened sides to receive a Wrench or other removable handle 26 for operating the stop-cock. This is clearly shown in Fig. 6. The stem 19 is surrounded by the stuffingbox 27 and the extension or plug valve 14 is surrounded by stufIing-box 28, mounted in the casing 10. The lower end of the plugvalve 14 is provided with the projecting stud 29, which-receives the washer 30 and nut 81, serving to hold the plu -valve tightly in its conical seat. The was er 30 is prevented from rotating relative to valve 14 by the pin 32. The lower end of said valve is protected by the cap 33, which is threaded into the casing 10 and is provided with the babbitted and from thence through the V-shaped groove 22 to passage-way 16 and thence to port 187 When it is desired to remove the expansion-valve for any cause, the stop-cock is rotated, by means of the independent handle 26, into the position shown in Fig. 4, thus completely cutting'ofl' the chamber 17. The expansion-valve may then be removed without the necessity of pumping out the entire refrigerating system, which, as will be understood, is filled with ammonia gas and liquid under high pressure. During this operation of removing the stuffing-box 27 and unscrewing the valve-stem 19 no-gas escapes. The stop-cock may, if so desired, be retained in this position until the trouble with the expansion-valve has been remedied, or if this repairing, &c., is to take any appreciable length of time the eXpansion-valve may be replaced by the lug-stem 35, as clearly shown in position 1n the valve'in Fig. 3 and removed from said valve in Fig. 7, and the stop-cock adjusted by means of handle 26 to act as an expansion-valve.

I aim in the appended claims to cover all modifications of my invention which do not involve a departure from its spirit and scope.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. As a combined stop-cock and expansion-valve for refrigeration-machines, a valvecasing provided with ports, a plug-valve provided with a passage-way adapted to register with and control the ports in said casing, a valve-seat in said plu -valve, a readily-removable eXpansion-va ve stem mounted within said plug-valve and adaptedto en gage said valve-seat to control the passageway through the plug-valve, and a plugstem capable of" replacing said ex ansionvalve stem to permit said rotatab e plugvalve to be used as an expansion-valve.

2. As a combined stop-cock and: expansion-valve for refrigerating-machines, a valvecasing, a hollow plug-valve rotatably mounted in said casing and having a passage-way therethrough, a valve-seat in said passageway, a readily-removable valve-stem cooperating with saidseat and movable toward and away from same to act asan eXpansionvalve, and a plug-stem replacing the expansion-valve to permit said rotatable plugvalvetobe used as an-eXpansion-valve.

In testimony whereof I hereby affix my signature in the presence of two witnesses.

FREDERICK W. FELSBERG.

Witnesses:

Enw. MAULINIER, J. S. LOUIS. 

